The Harley Medical Group, which carried out the survey, also questioned men, who now make up 40% of their patients.

Actor Jude Law got the most votes for lips (55%), while the most-admired nose belonged to presenter Jamie Theakston (36%).

Troy star Brad Pitt destroyed the competition with 74% of the votes for the best body shape - compared to David Beckham who only scored 8%.

But Louise Braham, director of the Harley Medical Group, said: "While it's interesting to look at which celebrities are most admired for a variety of features, these are not benchmarks that a surgeon would use prior to surgery - despite the fact that patients may well mention certain celebrity's features during a consultation."

Ms Braham said it was "incredibly important" that expectations were correctly established between the surgeon and patient before surgery.

"The patient must feel sure that the surgeon understands precisely the effect that they are looking for, while the surgeon will want to be sure that the patient has 100% accurate and realistic expectations of the results of the surgery and what to expect during the post-operative recovery," she added.

The most popular cosmetic procedures for women are breast enlargement, liposuction and nose jobs, while men mostly opt for liposuction and penis extensions.

Media pressure

Ms Braham said: "We would never say, 'Yes - we can give you Sienna's nose or Scarlett's lips'.

"Apart from anything else, what looks great on one person may be out of proportion or out of sync on another."

Dr Kerri McPherson, a body image expert at Queen Margaret University College in Edinburgh, said that some people felt pressured over what their bodies should look like by what they saw on TV and in magazines.

"Evolutionary psychologists understand this pressure from evolutionary processes, so we might say that particular women who have a smaller waist in relation to their hips tend to be more attractive to men," she said.

"That hip to waist ratio is a good index of fertility which makes men more likely to pick women who fit that model.

"Women who have plastic surgery are choosing to have procedures that make them appear younger so they can attract men.

"So they have their breasts done to make them more pert, have fat removed and their nose realigned to improve the proportion of their face."

Dr McPherson said all of these processes were not necessarily happening at a conscious level that the women was aware of.

"Magazines and the media tell women how they should look, and they tell them they should have pert breasts, a well-proportioned face and thin waist," she said.

But Dr McPherson said that celebrities should not be blamed for making women want to look like them, as they often faced the same pressures.

"The fact that they can afford to change the way they look also adds more pressure on to other women who have not got the same income," she said.